When an aircon does not turn on, the fault can come from power, control, or protection triggers. It does not always mean compressor failure. Start with basic checks, then confirm what was tested before paying for major work.
Primary question
My aircon cannot turn on at all. What should be checked first?
No-start symptoms can look similar while the root causes are different. Timing and behavior help narrow the path.
Ask for simple proof of what was tested before you approve expensive replacements.
Get urgent help if breaker trips repeatedly, there is burning smell, or restart attempts are unstable.
If a major replacement is proposed immediately without basic checks, pause and ask for a second opinion.
A practical guide to aircon flashing-light warnings, what to check first, and when to seek urgent help.
A practical guide for units that shut down unexpectedly, with pattern checks and urgent warning signs.
Use this guide to identify when a second technical opinion is warranted before major spending decisions.
Tell us what is happening. We will assess first, advise one clear next step, and you decide.
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